In this life, you can always recall the sins you've committed, long after you've repented and been forgiven of them. Maybe there's something specific that reminds you of your past transgressions. Like Peter must have felt every time he heard a rooster crow, you may sometimes feel burdened by your failings. But, the Savior forgets. Instead of dwelling on the things you've done wrong, when those memories surface...think of His grace. He gave His Spirit so that you could walk in strength and purpose despite your past. Be encouraged by that wonderful gift, that you are washed clean and given a fresh start. A time to heal and have peace in Him.